(19)
(11) EP 0 293 350 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
10.05.1989 Bulletin 1989/19

(43) Date of publication A2:
30.11.1988 Bulletin 1988/48

(21) Application number: 88850166.5

(22) Date of filing: 13.05.1988
(51) International Patent Classification (IPC)4: B01D 33/26, D21C 9/18
(84) Designated Contracting States:
DE FR GB IT

(30) Priority: 15.05.1987 SE 8702005

(71) Applicant: NILSSON, Harry
CH-8274 Tägerwilen (CH)

(72) Inventor:
  • NILSSON, Harry
    CH-8274 Tägerwilen (CH)

(74) Representative: Modin, Jan et al
c/o Axel Ehrners Patentbyra AB Box 10316
100 55 Stockholm
100 55 Stockholm (SE)


(56) References cited: : 
   
       


    (54) Filter for concentrating suspensions


    (57) A filter for concentrating fibre suspensions of the type where annular filter discs (2) rotate about a collection trough (13) for dewatered fibres. Each filter disc comprises two mutually spaced filter elements (3) which together with an annular wall (4) radially inwardly terminating the disc define a filtrate chamber (5) inside the disc. The filtrate chamber (5) communicates radially outwardly with the surroundings. The suspension container (1) of the filter is inwardly provided under the suspension surface with an arcuate duct (15) for each disc, said duct being in communication with the filtrate outlet (17) of the container. There is communication between each disc (2) and associated duct (15) such that the filtrate can be transferred from a filtrate chamber to the respective duct (15).







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